Write the equation from each line

Given: x + y = 6. if xe (-15, -6, -1), then which of the following sets of ordered pairs are solutions? © {(-15, -21), (-6, -12), (-1, -7)} [(-15, 21), (-6, , 7)} {(-15, 21), (-6, 12), (-1, -7)}

Find the midpoint m of z1=(8+5i) and z2=(12+3i)

Me. i can't figure out this question. give an explanation too. .